ENZYMATIC AND MICROBIAL ACTIVITY IN RADIATION STERILIZED SOIL
Thesis/Dissertation
·
OSTI ID:4177046
Soil was treated with ionizing radiations of high intensities and potentials to obtain sterile soil having physical and chemical properties nearly like those of normal field soil. Such soil retained some enzyme activities. Different types of loam were treated with a beam of 5 to 9 Mev electrons, Co/sup 60/ gamma rays, and hard x rays to determine the influence of these irradiations on soil microbial population, on enzymatic (phosphatase) activity in soil, and on the suitability of irradiated soil for microbial culture under laboratory conditions. For a given soil the survival curves of aerobic and anaerobic bacteria with irradiation were almost superimposable; survival curves differ among soils. Bacterial numbers approach zero at 2 x 10/sup 6/ rep doses and those of fungi at 0.3 x 10/sup 6/ rep doses. To insure complete sterility, 4 x 10/sup 6/ to 5 x 10/sup 6/ rep doses were necessary for large soil volumes. This technique provides soil which can be studied in the absence of a microbial population, and also a medium for studying soil microorganisms. Such soils are also useful for growth of sterile plants without interference of microbes. (M.P.G.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-18-000120
- OSTI ID:
- 4177046
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
BACTERIA
BIOLOGY AND MEDICINE
CALCITE
CALCIUM CARBONATES
CHEMICAL REACTIONS
CLAYS
COBALT 60
COMPOUNDS
CRYSTALS
ELECTRON BEAMS
ELECTRON MICROSCOPY
ENZYMES
FUNGI
GAMMA RADIATION
GRAIN SIZE
HIGH TEMPERATURE
LATTICES
MEASURED VALUES
MELTING
MINERALS
NUMERICALS
PHOSPHATASES
PHOTOGRAPHIC FILM
PLANTS
PREPARATION
PRESSURE
QUANTITATIVE ANALYSIS
QUANTITY RATIO
RADIATION DOSES
RADIATION EFFECTS
SINTERING
SODIUM CARBONATES
SODIUM HYDROXIDES
SODIUM SILICATES
SOILS
SOLUTIONS
STERILIZATION
SURFACES
USES
WATER
X RADIATION
ZIRCONIUM
ZIRCONIUM SILICATES
BIOLOGY AND MEDICINE
CALCITE
CALCIUM CARBONATES
CHEMICAL REACTIONS
CLAYS
COBALT 60
COMPOUNDS
CRYSTALS
ELECTRON BEAMS
ELECTRON MICROSCOPY
ENZYMES
FUNGI
GAMMA RADIATION
GRAIN SIZE
HIGH TEMPERATURE
LATTICES
MEASURED VALUES
MELTING
MINERALS
NUMERICALS
PHOSPHATASES
PHOTOGRAPHIC FILM
PLANTS
PREPARATION
PRESSURE
QUANTITATIVE ANALYSIS
QUANTITY RATIO
RADIATION DOSES
RADIATION EFFECTS
SINTERING
SODIUM CARBONATES
SODIUM HYDROXIDES
SODIUM SILICATES
SOILS
SOLUTIONS
STERILIZATION
SURFACES
USES
WATER
X RADIATION
ZIRCONIUM
ZIRCONIUM SILICATES